X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_vfs_single.c;h=d5b875314005a36afe115ba7abd656bf6b3eff39;hp=2e92c2543281afdae8d2c1edd35a74f0c5306372;hb=79b0411a349d7b13384025f39be4d79e64f14f22;hpb=9131fecc79ad4e5fbdb775cdc067bc80aae5adb8 diff --git a/yaffs_vfs_single.c b/yaffs_vfs_single.c index 2e92c25..d5b8753 100644 --- a/yaffs_vfs_single.c +++ b/yaffs_vfs_single.c @@ -57,7 +57,6 @@ #include - #include #define UnlockPage(p) unlock_page(p) @@ -72,12 +71,11 @@ #define WRITE_SIZE_STR "writesize" #define WRITE_SIZE(mtd) ((mtd)->writesize) - static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) { uint64_t result = partition_size; do_div(result, block_size); - return (uint32_t)result; + return (uint32_t) result; } #include @@ -86,6 +84,7 @@ static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) #include "yportenv.h" #include "yaffs_trace.h" #include "yaffs_guts.h" +#include "yaffs_attribs.h" #include "yaffs_linux.h" @@ -106,482 +105,304 @@ module_param(yaffs_auto_checkpoint, uint, 0644); module_param(yaffs_gc_control, uint, 0644); module_param(yaffs_bg_enable, uint, 0644); -#define Y_IGET(sb, inum) yaffs_iget((sb), (inum)) - -static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino); #define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private) #define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr))) #define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode) #define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info) - #define update_dir_time(dir) do {\ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \ } while(0) - -static void yaffs_put_super(struct super_block *sb); -static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, - loff_t *pos); -static ssize_t yaffs_hold_space(struct file *f); -static void yaffs_release_space(struct file *f); - -static int yaffs_file_flush(struct file *file, fl_owner_t id); -static int yaffs_sync_object(struct file *file, int datasync); +static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev) +{ + return yaffs_gc_control; +} -static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); +static void yaffs_gross_lock(struct yaffs_dev *dev) +{ + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current); + mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock)); + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current); +} -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *n); -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *n); -static int yaffs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry); -static int yaffs_unlink(struct inode *dir, struct dentry *dentry); -static int yaffs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname); -static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode); +static void yaffs_gross_unlock(struct yaffs_dev *dev) +{ + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current); + mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock)); +} -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - dev_t dev); -static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry); -static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); +static void yaffs_fill_inode_from_obj(struct inode *inode, + struct yaffs_obj *obj); -static int yaffs_sync_fs(struct super_block *sb, int wait); -static void yaffs_write_super(struct super_block *sb); +static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) +{ + struct inode *inode; + struct yaffs_obj *obj; + struct yaffs_dev *dev = yaffs_super_to_dev(sb); -static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino); -#ifdef YAFFS_HAS_PUT_INODE -static void yaffs_put_inode(struct inode *inode); -#endif + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; -static void yaffs_evict_inode(struct inode *); + /* NB This is called as a side effect of other functions, but + * we had to release the lock to prevent deadlocks, so + * need to lock again. + */ -static int yaffs_readpage(struct file *file, struct page *page); -static int yaffs_writepage(struct page *page, struct writeback_control *wbc); + yaffs_gross_lock(dev); -#ifdef CONFIG_YAFFS_XATTR -int yaffs_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags); -ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff, - size_t size); -int yaffs_removexattr(struct dentry *dentry, const char *name); -ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size); -#endif + obj = yaffs_find_by_number(dev, inode->i_ino); + yaffs_fill_inode_from_obj(inode, obj); -static int yaffs_write_begin(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata); -static int yaffs_write_end(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *pg, void *fsdadata); + yaffs_gross_unlock(dev); -static int yaffs_readlink(struct dentry *dentry, char __user *buffer, - int buflen); -void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias); -static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); + unlock_new_inode(inode); + return inode; +} -static void yaffs_touch_super(struct yaffs_dev *dev); +struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, + struct yaffs_obj *obj) +{ + struct inode *inode; -static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin); + if (!sb) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for NULL super_block!!"); + return NULL; -static int yaffs_vfs_setattr(struct inode *, struct iattr *); + } + if (!obj) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for NULL object!!"); + return NULL; -static struct address_space_operations yaffs_file_address_operations = { - .readpage = yaffs_readpage, - .writepage = yaffs_writepage, - .write_begin = yaffs_write_begin, - .write_end = yaffs_write_end, -}; + } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for object %d", + obj->obj_id); -static const struct file_operations yaffs_file_operations = { - .read = do_sync_read, - .write = do_sync_write, - .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write, - .mmap = generic_file_mmap, - .flush = yaffs_file_flush, - .fsync = yaffs_sync_object, - .splice_read = generic_file_splice_read, - .splice_write = generic_file_splice_write, - .llseek = generic_file_llseek, -}; + inode = yaffs_iget(sb, obj->obj_id); + if (IS_ERR(inode)) + return NULL; + /* NB Side effect: iget calls back to yaffs_read_inode(). */ + /* iget also increments the inode's i_count */ + /* NB You can't be holding gross_lock or deadlock will happen! */ + return inode; +} -static const struct inode_operations yaffs_file_inode_operations = { - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; +static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, + dev_t rdev) +{ + struct inode *inode; -static const struct inode_operations yaffs_symlink_inode_operations = { - .readlink = yaffs_readlink, - .follow_link = yaffs_follow_link, - .put_link = yaffs_put_link, - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; + struct yaffs_obj *obj = NULL; + struct yaffs_dev *dev; -static const struct inode_operations yaffs_dir_inode_operations = { - .create = yaffs_create, - .lookup = yaffs_lookup, - .link = yaffs_link, - .unlink = yaffs_unlink, - .symlink = yaffs_symlink, - .mkdir = yaffs_mkdir, - .rmdir = yaffs_unlink, - .mknod = yaffs_mknod, - .rename = yaffs_rename, - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; + struct yaffs_obj *parent = yaffs_inode_to_obj(dir); -static const struct file_operations yaffs_dir_operations = { - .read = generic_read_dir, - .readdir = yaffs_readdir, - .fsync = yaffs_sync_object, - .llseek = yaffs_dir_llseek, -}; + int error = -ENOSPC; + uid_t uid = current->cred->fsuid; + gid_t gid = + (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; -static const struct super_operations yaffs_super_ops = { - .statfs = yaffs_statfs, -#ifdef YAFFS_HAS_PUT_INODE - .put_inode = yaffs_put_inode, -#endif - .put_super = yaffs_put_super, - .evict_inode = yaffs_evict_inode, - .sync_fs = yaffs_sync_fs, - .write_super = yaffs_write_super, -}; + if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) + mode |= S_ISGID; + if (parent) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: parent object %d type %d", + parent->obj_id, parent->variant_type); + } else { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: could not get parent object"); + return -EPERM; + } -static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr) -{ - setattr_copy(inode,attr); - return 0; -} + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: making oject for %s, mode %x dev %x", + dentry->d_name.name, mode, rdev); -static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize) -{ - truncate_setsize(inode,newsize); - return 0; -} + dev = parent->my_dev; -static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev) -{ - return yaffs_gc_control; -} - -static void yaffs_gross_lock(struct yaffs_dev *dev) -{ - T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current)); - down(&(yaffs_dev_to_lc(dev)->gross_lock)); - T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current)); -} + yaffs_gross_lock(dev); -static void yaffs_gross_unlock(struct yaffs_dev *dev) -{ - T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current)); - up(&(yaffs_dev_to_lc(dev)->gross_lock)); -} + switch (mode & S_IFMT) { + default: + /* Special (socket, fifo, device...) */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special"); + obj = + yaffs_create_special(parent, dentry->d_name.name, mode, uid, + gid, old_encode_dev(rdev)); + break; + case S_IFREG: /* file */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file"); + obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid, + gid); + break; + case S_IFDIR: /* directory */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory"); + obj = yaffs_create_dir(parent, dentry->d_name.name, mode, + uid, gid); + break; + case S_IFLNK: /* symlink */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink"); + obj = NULL; /* Do we ever get here? */ + break; + } + /* Can not call yaffs_get_inode() with gross lock held */ + yaffs_gross_unlock(dev); + if (obj) { + inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); + d_instantiate(dentry, inode); + update_dir_time(dir); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod created object %d count = %d", + obj->obj_id, atomic_read(&inode->i_count)); + error = 0; + yaffs_fill_inode_from_obj(dir, parent); + } else { + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object"); + error = -ENOMEM; + } -/* ExportFS support */ -static struct inode * -yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation) -{ - return Y_IGET(sb, ino); + return error; } -static struct dentry * -yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) +static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) { - return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ; + return yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); } -static struct dentry * - yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) +static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *n) { - return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode); + return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); } -struct dentry *yaffs2_get_parent(struct dentry *dentry) +static int yaffs_link(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) { + struct inode *inode = old_dentry->d_inode; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *link = NULL; + struct yaffs_dev *dev; - struct super_block *sb = dentry->d_inode->i_sb; - struct dentry *parent = ERR_PTR(-ENOENT); - struct inode *inode; - unsigned long parent_ino; - struct yaffs_obj *d_obj; - struct yaffs_obj *parent_obj; + yaffs_trace(YAFFS_TRACE_OS, "yaffs_link"); - d_obj = yaffs_inode_to_obj(dentry->d_inode); + obj = yaffs_inode_to_obj(inode); + dev = obj->my_dev; - if (d_obj) { - parent_obj = d_obj->parent; - if (parent_obj) { - parent_ino = yaffs_get_obj_inode(parent_obj); - inode = Y_IGET(sb, parent_ino); + yaffs_gross_lock(dev); - if (IS_ERR(inode)) { - parent = ERR_CAST(inode); - } else { - parent = d_obtain_alias(inode); - if (!IS_ERR(parent)) { - parent = ERR_PTR(-ENOMEM); - iput(inode); - } - } - } + if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ + link = + yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name, + obj); + + if (link) { + old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj); + d_instantiate(dentry, old_dentry->d_inode); + atomic_inc(&old_dentry->d_inode->i_count); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_link link count %d i_count %d", + old_dentry->d_inode->i_nlink, + atomic_read(&old_dentry->d_inode->i_count)); } - return parent; -} + yaffs_gross_unlock(dev); -/* Just declare a zero structure as a NULL value implies - * using the default functions of exportfs. - */ + if (link) { + update_dir_time(dir); + return 0; + } + + return -EPERM; +} -static struct export_operations yaffs_export_ops = +static int yaffs_symlink(struct inode *dir, struct dentry *dentry, + const char *symname) { - .fh_to_dentry = yaffs2_fh_to_dentry, - .fh_to_parent = yaffs2_fh_to_parent, - .get_parent = yaffs2_get_parent, -} ; - -/*-----------------------------------------------------------------*/ -/* Directory search context allows us to unlock access to yaffs during - * filldir without causing problems with the directory being modified. - * This is similar to the tried and tested mechanism used in yaffs direct. - * - * A search context iterates along a doubly linked list of siblings in the - * directory. If the iterating object is deleted then this would corrupt - * the list iteration, likely causing a crash. The search context avoids - * this by using the remove_obj_fn to move the search context to the - * next object before the object is deleted. - * - * Many readdirs (and thus seach conexts) may be alive simulateously so - * each struct yaffs_dev has a list of these. - * - * A seach context lives for the duration of a readdir. - * - * All these functions must be called while yaffs is locked. - */ - -struct yaffs_search_context { - struct yaffs_dev *dev; - struct yaffs_obj *dir_obj; - struct yaffs_obj *next_return; - struct ylist_head others; -}; - -/* - * yaffs_new_search() creates a new search context, initialises it and - * adds it to the device's search context list. - * - * Called at start of readdir. - */ -static struct yaffs_search_context * yaffs_new_search(struct yaffs_obj *dir) -{ - struct yaffs_dev *dev = dir->my_dev; - struct yaffs_search_context *sc = YMALLOC(sizeof(struct yaffs_search_context)); - if(sc){ - sc->dir_obj = dir; - sc->dev = dev; - if( ylist_empty(&sc->dir_obj->variant.dir_variant.children)) - sc->next_return = NULL; - else - sc->next_return = ylist_entry( - dir->variant.dir_variant.children.next, - struct yaffs_obj,siblings); - YINIT_LIST_HEAD(&sc->others); - ylist_add(&sc->others,&(yaffs_dev_to_lc(dev)->search_contexts)); - } - return sc; -} - -/* - * yaffs_search_end() disposes of a search context and cleans up. - */ -static void yaffs_search_end(struct yaffs_search_context * sc) -{ - if(sc){ - ylist_del(&sc->others); - YFREE(sc); - } -} - -/* - * yaffs_search_advance() moves a search context to the next object. - * Called when the search iterates or when an object removal causes - * the search context to be moved to the next object. - */ -static void yaffs_search_advance(struct yaffs_search_context *sc) -{ - if(!sc) - return; - - if( sc->next_return == NULL || - ylist_empty(&sc->dir_obj->variant.dir_variant.children)) - sc->next_return = NULL; - else { - struct ylist_head *next = sc->next_return->siblings.next; - - if( next == &sc->dir_obj->variant.dir_variant.children) - sc->next_return = NULL; /* end of list */ - else - sc->next_return = ylist_entry(next,struct yaffs_obj,siblings); - } -} - -/* - * yaffs_remove_obj_callback() is called when an object is unlinked. - * We check open search contexts and advance any which are currently - * on the object being iterated. - */ -static void yaffs_remove_obj_callback(struct yaffs_obj *obj) -{ - - struct ylist_head *i; - struct yaffs_search_context *sc; - struct ylist_head *search_contexts = &(yaffs_dev_to_lc(obj->my_dev)->search_contexts); + struct yaffs_obj *obj; + struct yaffs_dev *dev; + uid_t uid = current->cred->fsuid; + gid_t gid = + (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; + yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink"); - /* Iterate through the directory search contexts. - * If any are currently on the object being removed, then advance - * the search context to the next object to prevent a hanging pointer. - */ - ylist_for_each(i, search_contexts) { - if (i) { - sc = ylist_entry(i, struct yaffs_search_context,others); - if(sc->next_return == obj) - yaffs_search_advance(sc); - } - } - -} - - -/*-----------------------------------------------------------------*/ - -static int yaffs_readlink(struct dentry *dentry, char __user *buffer, - int buflen) -{ - unsigned char *alias; - int ret; - - struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; - + dev = yaffs_inode_to_obj(dir)->my_dev; yaffs_gross_lock(dev); - - alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); - + obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name, + S_IFLNK | S_IRWXUGO, uid, gid, symname); yaffs_gross_unlock(dev); - if (!alias) - return -ENOMEM; - - ret = vfs_readlink(dentry, buffer, buflen, alias); - kfree(alias); - return ret; -} - -static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - unsigned char *alias; - void *ret; - struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; - - yaffs_gross_lock(dev); - - alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); - yaffs_gross_unlock(dev); + if (obj) { + struct inode *inode; - if (!alias) { - ret = ERR_PTR(-ENOMEM); - goto out; + inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); + d_instantiate(dentry, inode); + update_dir_time(dir); + yaffs_trace(YAFFS_TRACE_OS, "symlink created OK"); + return 0; + } else { + yaffs_trace(YAFFS_TRACE_OS, "symlink not created"); } - nd_set_link(nd, alias); - ret = (void *)alias; -out: - return ret; -} - -void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) { - kfree(alias); + return -ENOMEM; } -struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, - struct yaffs_obj *obj); - -/* - * Lookup is used to find objects in the fs - */ - static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *n) + struct nameidata *n) { struct yaffs_obj *obj; - struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */ + struct inode *inode = NULL; struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev; - if(current != yaffs_dev_to_lc(dev)->readdir_process) + if (current != yaffs_dev_to_lc(dev)->readdir_process) yaffs_gross_lock(dev); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_lookup for %d:%s\n"), - yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name)); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_lookup for %d:%s", + yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name); - obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), - dentry->d_name.name); + obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name); obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */ /* Can't hold gross lock when calling yaffs_get_inode() */ - if(current != yaffs_dev_to_lc(dev)->readdir_process) + if (current != yaffs_dev_to_lc(dev)->readdir_process) yaffs_gross_unlock(dev); if (obj) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_lookup found %d\n"), obj->obj_id)); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_lookup found %d", obj->obj_id); inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); if (inode) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_loookup dentry \n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_loookup dentry"); d_add(dentry, inode); /* return dentry; */ return NULL; } } else { - T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found"); } @@ -590,595 +411,399 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, return NULL; } - -#ifdef YAFFS_HAS_PUT_INODE - -/* For now put inode is just for debugging - * Put inode is called when the inode **structure** is put. - */ -static void yaffs_put_inode(struct inode *inode) -{ - T(YAFFS_TRACE_OS, - (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino, - atomic_read(&inode->i_count))); - -} -#endif - - -static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj) +static int yaffs_unlink(struct inode *dir, struct dentry *dentry) { - /* Clear the association between the inode and - * the struct yaffs_obj. - */ - obj->my_inode = NULL; - yaffs_inode_to_obj_lv(inode) = NULL; - - /* If the object freeing was deferred, then the real - * free happens now. - * This should fix the inode inconsistency problem. - */ - yaffs_handle_defered_free(obj); -} + int ret_val; -/* yaffs_evict_inode combines into one operation what was previously done in - * yaffs_clear_inode() and yaffs_delete_inode() - * - */ -static void yaffs_evict_inode( struct inode *inode) -{ - struct yaffs_obj *obj; struct yaffs_dev *dev; - int deleteme = 0; + struct yaffs_obj *obj; - obj = yaffs_inode_to_obj(inode); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_unlink %d:%s", + (int)(dir->i_ino), dentry->d_name.name); + obj = yaffs_inode_to_obj(dir); + dev = obj->my_dev; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino, - atomic_read(&inode->i_count), - obj ? "object exists" : "null object")); + yaffs_gross_lock(dev); - if (!inode->i_nlink && !is_bad_inode(inode)) - deleteme = 1; - truncate_inode_pages(&inode->i_data,0); - end_writeback(inode); + ret_val = yaffs_unlinker(obj, dentry->d_name.name); - if(deleteme && obj){ - dev = obj->my_dev; - yaffs_gross_lock(dev); - yaffs_del_obj(obj); - yaffs_gross_unlock(dev); - } - if (obj) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - yaffs_unstitch_obj(inode,obj); + if (ret_val == YAFFS_OK) { + dentry->d_inode->i_nlink--; + dir->i_version++; yaffs_gross_unlock(dev); + mark_inode_dirty(dentry->d_inode); + update_dir_time(dir); + return 0; } - - + yaffs_gross_unlock(dev); + return -ENOTEMPTY; } - -static int yaffs_file_flush(struct file *file, fl_owner_t id) +static int yaffs_sync_object(struct file *file, int datasync) { - struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry); - - struct yaffs_dev *dev = obj->my_dev; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_flush object %d (%s)\n"), obj->obj_id, - obj->dirty ? "dirty" : "clean")); + struct yaffs_obj *obj; + struct yaffs_dev *dev; + struct dentry *dentry = file->f_path.dentry; - yaffs_gross_lock(dev); + obj = yaffs_dentry_to_obj(dentry); - yaffs_flush_file(obj, 1, 0); + dev = obj->my_dev; + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object"); + yaffs_gross_lock(dev); + yaffs_flush_file(obj, 1, datasync); yaffs_gross_unlock(dev); - return 0; } - -static int yaffs_readpage_nolock(struct file *f, struct page *pg) +/* + * The VFS layer already does all the dentry stuff for rename. + * + * NB: POSIX says you can rename an object over an old object of the same name + */ +static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) { - /* Lifted from jffs2 */ - - struct yaffs_obj *obj; - unsigned char *pg_buf; - int ret; - struct yaffs_dev *dev; + int ret_val = YAFFS_FAIL; + struct yaffs_obj *target; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"), - (unsigned)(pg->index << PAGE_CACHE_SHIFT), - (unsigned)PAGE_CACHE_SIZE)); - - obj = yaffs_dentry_to_obj(f->f_dentry); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename"); + dev = yaffs_inode_to_obj(old_dir)->my_dev; - dev = obj->my_dev; + yaffs_gross_lock(dev); - BUG_ON(!PageLocked(pg)); + /* Check if the target is an existing directory that is not empty. */ + target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir), + new_dentry->d_name.name); - pg_buf = kmap(pg); - /* FIXME: Can kmap fail? */ + if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && + !list_empty(&target->variant.dir_variant.children)) { - yaffs_gross_lock(dev); + yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir"); - ret = yaffs_file_rd(obj, pg_buf, - pg->index << PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE); + ret_val = YAFFS_FAIL; + } else { + /* Now does unlinking internally using shadowing mechanism */ + yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj"); + ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir), + old_dentry->d_name.name, + yaffs_inode_to_obj(new_dir), + new_dentry->d_name.name); + } yaffs_gross_unlock(dev); - if (ret >= 0) - ret = 0; + if (ret_val == YAFFS_OK) { + if (target) { + new_dentry->d_inode->i_nlink--; + mark_inode_dirty(new_dentry->d_inode); + } - if (ret) { - ClearPageUptodate(pg); - SetPageError(pg); + update_dir_time(old_dir); + if (old_dir != new_dir) + update_dir_time(new_dir); + return 0; } else { - SetPageUptodate(pg); - ClearPageError(pg); + return -ENOTEMPTY; } - - flush_dcache_page(pg); - kunmap(pg); - - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n"))); - return ret; } -static int yaffs_readpage_unlock(struct file *f, struct page *pg) -{ - int ret = yaffs_readpage_nolock(f, pg); - UnlockPage(pg); - return ret; -} - -static int yaffs_readpage(struct file *f, struct page *pg) -{ - int ret; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n"))); - ret=yaffs_readpage_unlock(f, pg); - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n"))); - return ret; -} - -/* writepage inspired by/stolen from smbfs */ - -static int yaffs_writepage(struct page *page, struct writeback_control *wbc) +static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) { + struct inode *inode = dentry->d_inode; + int error = 0; struct yaffs_dev *dev; - struct address_space *mapping = page->mapping; - struct inode *inode; - unsigned long end_index; - char *buffer; - struct yaffs_obj *obj; - int n_written = 0; - unsigned n_bytes; - loff_t i_size; - - if (!mapping) - BUG(); - inode = mapping->host; - if (!inode) - BUG(); - i_size = i_size_read(inode); - - end_index = i_size >> PAGE_CACHE_SHIFT; - if(page->index < end_index) - n_bytes = PAGE_CACHE_SIZE; - else { - n_bytes = i_size & (PAGE_CACHE_SIZE -1); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_setattr of object %d", + yaffs_inode_to_obj(inode)->obj_id); - if (page->index > end_index || !n_bytes) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"), - (unsigned)(page->index << PAGE_CACHE_SHIFT), - (unsigned)inode->i_size)); - T(YAFFS_TRACE_OS, - (TSTR(" -> don't care!!\n"))); + /* Fail if a requested resize >= 2GB */ + if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31)) + error = -EINVAL; - zero_user_segment(page,0,PAGE_CACHE_SIZE); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - return 0; + if (error == 0) + error = inode_change_ok(inode, attr); + if (error == 0) { + int result; + if (!error) { + setattr_copy(inode, attr); + yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called"); + if (attr->ia_valid & ATTR_SIZE) { + truncate_setsize(inode, attr->ia_size); + inode->i_blocks = (inode->i_size + 511) >> 9; + } } - } - - if(n_bytes != PAGE_CACHE_SIZE) - zero_user_segment(page,n_bytes,PAGE_CACHE_SIZE); - - get_page(page); - - buffer = kmap(page); - - obj = yaffs_inode_to_obj(inode); - dev = obj->my_dev; - yaffs_gross_lock(dev); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_writepage at %08x, size %08x\n"), - (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes)); - T(YAFFS_TRACE_OS, - (TSTR("writepag0: obj = %05x, ino = %05x\n"), - (int)obj->variant.file_variant.file_size, (int)inode->i_size)); - - n_written = yaffs_wr_file(obj, buffer, - page->index << PAGE_CACHE_SHIFT, n_bytes, 0); - - yaffs_touch_super(dev); - - T(YAFFS_TRACE_OS, - (TSTR("writepag1: obj = %05x, ino = %05x\n"), - (int)obj->variant.file_variant.file_size, (int)inode->i_size)); - - yaffs_gross_unlock(dev); - - kunmap(page); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - put_page(page); - - return (n_written == n_bytes) ? 0 : -ENOSPC; -} - - -static int yaffs_write_begin(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - struct page *pg = NULL; - pgoff_t index = pos >> PAGE_CACHE_SHIFT; - - int ret = 0; - int space_held = 0; - - /* Get a page */ - pg = grab_cache_page_write_begin(mapping, index, flags); - - *pagep = pg; - if (!pg) { - ret = -ENOMEM; - goto out; - } - T(YAFFS_TRACE_OS, - (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"), - (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0)); - - /* Get fs space */ - space_held = yaffs_hold_space(filp); + dev = yaffs_inode_to_obj(inode)->my_dev; + if (attr->ia_valid & ATTR_SIZE) { + yaffs_trace(YAFFS_TRACE_OS, "resize to %d(%x)", + (int)(attr->ia_size), + (int)(attr->ia_size)); + } + yaffs_gross_lock(dev); + result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr); + if (result == YAFFS_OK) { + error = 0; + } else { + error = -EPERM; + } + yaffs_gross_unlock(dev); - if (!space_held) { - ret = -ENOSPC; - goto out; } - /* Update page if required */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error); - if (!Page_Uptodate(pg)) - ret = yaffs_readpage_nolock(filp, pg); - - if (ret) - goto out; - - /* Happy path return */ - T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n"))); - - return 0; - -out: - T(YAFFS_TRACE_OS, - (TSTR("end yaffs_write_begin fail returning %d\n"), ret)); - if (space_held) - yaffs_release_space(filp); - if (pg) { - unlock_page(pg); - page_cache_release(pg); - } - return ret; + return error; } - -static int yaffs_write_end(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *pg, void *fsdadata) +#ifdef CONFIG_YAFFS_XATTR +static int yaffs_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags) { - int ret = 0; - void *addr, *kva; - uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); - - kva = kmap(pg); - addr = kva + offset_into_page; + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - T(YAFFS_TRACE_OS, - ("yaffs_write_end addr %p pos %x n_bytes %d\n", - addr,(unsigned)pos, copied)); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id); - ret = yaffs_file_write(filp, addr, copied, &pos); + if (error == 0) { + int result; + dev = obj->my_dev; + yaffs_gross_lock(dev); + result = yaffs_set_xattrib(obj, name, value, size, flags); + if (result == YAFFS_OK) + error = 0; + else if (result < 0) + error = result; + yaffs_gross_unlock(dev); - if (ret != copied) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_write_end not same size ret %d copied %d\n"), - ret, copied)); - SetPageError(pg); - } else { - /* Nothing */ } + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error); - kunmap(pg); - - yaffs_release_space(filp); - unlock_page(pg); - page_cache_release(pg); - return ret; + return error; } - -static void yaffs_fill_inode_from_obj(struct inode *inode, struct yaffs_obj *obj) +static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff, + size_t size) { - if (inode && obj) { - - - /* Check mode against the variant type and attempt to repair if broken. */ - u32 mode = obj->yst_mode; - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - if (!S_ISREG(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFREG; - } - - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if (!S_ISLNK(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFLNK; - } - - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - if (!S_ISDIR(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFDIR; - } - - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - default: - /* TODO? */ - break; - } - - inode->i_flags |= S_NOATIME; - - inode->i_ino = obj->obj_id; - inode->i_mode = obj->yst_mode; - inode->i_uid = obj->yst_uid; - inode->i_gid = obj->yst_gid; - - inode->i_rdev = old_decode_dev(obj->yst_rdev); - - inode->i_atime.tv_sec = (time_t) (obj->yst_atime); - inode->i_atime.tv_nsec = 0; - inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; - inode->i_mtime.tv_nsec = 0; - inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; - inode->i_ctime.tv_nsec = 0; - inode->i_size = yaffs_get_obj_length(obj); - inode->i_blocks = (inode->i_size + 511) >> 9; - - inode->i_nlink = yaffs_get_obj_link_count(obj); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_fill_inode mode %x uid %d gid %d size %d count %d\n"), - inode->i_mode, inode->i_uid, inode->i_gid, - (int)inode->i_size, atomic_read(&inode->i_count))); - - switch (obj->yst_mode & S_IFMT) { - default: /* fifo, device or socket */ - init_special_inode(inode, obj->yst_mode, - old_decode_dev(obj->yst_rdev)); - break; - case S_IFREG: /* file */ - inode->i_op = &yaffs_file_inode_operations; - inode->i_fop = &yaffs_file_operations; - inode->i_mapping->a_ops = - &yaffs_file_address_operations; - break; - case S_IFDIR: /* directory */ - inode->i_op = &yaffs_dir_inode_operations; - inode->i_fop = &yaffs_dir_operations; - break; - case S_IFLNK: /* symlink */ - inode->i_op = &yaffs_symlink_inode_operations; - break; - } + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - yaffs_inode_to_obj_lv(inode) = obj; + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_getxattr \"%s\" from object %d", + name, obj->obj_id); - obj->my_inode = inode; + if (error == 0) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + error = yaffs_get_xattrib(obj, name, buff, size); + yaffs_gross_unlock(dev); - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_fill_inode invalid parameters\n"))); } + yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error); + return error; } -struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, - struct yaffs_obj *obj) +static int yaffs_removexattr(struct dentry *dentry, const char *name) { - struct inode *inode; - - if (!sb) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for NULL super_block!!\n"))); - return NULL; + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_removexattr of object %d", obj->obj_id); - if (!obj) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for NULL object!!\n"))); - return NULL; + if (error == 0) { + int result; + dev = obj->my_dev; + yaffs_gross_lock(dev); + result = yaffs_remove_xattrib(obj, name); + if (result == YAFFS_OK) + error = 0; + else if (result < 0) + error = result; + yaffs_gross_unlock(dev); } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_removexattr done returning %d", error); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for object %d\n"), obj->obj_id)); - - inode = Y_IGET(sb, obj->obj_id); - if (IS_ERR(inode)) - return NULL; - - /* NB Side effect: iget calls back to yaffs_read_inode(). */ - /* iget also increments the inode's i_count */ - /* NB You can't be holding gross_lock or deadlock will happen! */ - - return inode; + return error; } -static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, - loff_t *pos) +static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size) { - struct yaffs_obj *obj; - int n_written, ipos; - struct inode *inode; + struct inode *inode = dentry->d_inode; + int error = 0; struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - inode = f->f_dentry->d_inode; + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_listxattr of object %d", obj->obj_id); - if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) - ipos = inode->i_size; - else - ipos = *pos; - - if (!obj) - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write: hey obj is null!\n"))); - else - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write about to write writing %u(%x) bytes" - "to object %d at %d(%x)\n"), - (unsigned) n, (unsigned) n, obj->obj_id, ipos,ipos)); + if (error == 0) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + error = yaffs_list_xattrib(obj, buff, size); + yaffs_gross_unlock(dev); - n_written = yaffs_wr_file(obj, buf, ipos, n, 0); + } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_listxattr done returning %d", error); - yaffs_touch_super(dev); + return error; +} - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write: %d(%x) bytes written\n"), - (unsigned )n,(unsigned)n)); +#endif - if (n_written > 0) { - ipos += n_written; - *pos = ipos; - if (ipos > inode->i_size) { - inode->i_size = ipos; - inode->i_blocks = (ipos + 511) >> 9; +static const struct inode_operations yaffs_dir_inode_operations = { + .create = yaffs_create, + .lookup = yaffs_lookup, + .link = yaffs_link, + .unlink = yaffs_unlink, + .symlink = yaffs_symlink, + .mkdir = yaffs_mkdir, + .rmdir = yaffs_unlink, + .mknod = yaffs_mknod, + .rename = yaffs_rename, + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; +/*-----------------------------------------------------------------*/ +/* Directory search context allows us to unlock access to yaffs during + * filldir without causing problems with the directory being modified. + * This is similar to the tried and tested mechanism used in yaffs direct. + * + * A search context iterates along a doubly linked list of siblings in the + * directory. If the iterating object is deleted then this would corrupt + * the list iteration, likely causing a crash. The search context avoids + * this by using the remove_obj_fn to move the search context to the + * next object before the object is deleted. + * + * Many readdirs (and thus seach conexts) may be alive simulateously so + * each struct yaffs_dev has a list of these. + * + * A seach context lives for the duration of a readdir. + * + * All these functions must be called while yaffs is locked. + */ - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write size updated to %d bytes, " - "%d blocks\n"), - ipos, (int)(inode->i_blocks))); - } +struct yaffs_search_context { + struct yaffs_dev *dev; + struct yaffs_obj *dir_obj; + struct yaffs_obj *next_return; + struct list_head others; +}; +/* + * yaffs_new_search() creates a new search context, initialises it and + * adds it to the device's search context list. + * + * Called at start of readdir. + */ +static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir) +{ + struct yaffs_dev *dev = dir->my_dev; + struct yaffs_search_context *sc = + kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS); + if (sc) { + sc->dir_obj = dir; + sc->dev = dev; + if (list_empty(&sc->dir_obj->variant.dir_variant.children)) + sc->next_return = NULL; + else + sc->next_return = + list_entry(dir->variant.dir_variant.children.next, + struct yaffs_obj, siblings); + INIT_LIST_HEAD(&sc->others); + list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts)); } - yaffs_gross_unlock(dev); - return (n_written == 0) && (n > 0) ? -ENOSPC : n_written; + return sc; } -/* Space holding and freeing is done to ensure we have space available for write_begin/end */ -/* For now we just assume few parallel writes and check against a small number. */ -/* Todo: need to do this with a counter to handle parallel reads better */ - -static ssize_t yaffs_hold_space(struct file *f) +/* + * yaffs_search_end() disposes of a search context and cleans up. + */ +static void yaffs_search_end(struct yaffs_search_context *sc) { - struct yaffs_obj *obj; - struct yaffs_dev *dev; - - int n_free_chunks; - - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - n_free_chunks = yaffs_get_n_free_chunks(dev); - - yaffs_gross_unlock(dev); - - return (n_free_chunks > 20) ? 1 : 0; + if (sc) { + list_del(&sc->others); + kfree(sc); + } } -static void yaffs_release_space(struct file *f) +/* + * yaffs_search_advance() moves a search context to the next object. + * Called when the search iterates or when an object removal causes + * the search context to be moved to the next object. + */ +static void yaffs_search_advance(struct yaffs_search_context *sc) { - struct yaffs_obj *obj; - struct yaffs_dev *dev; - - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); + if (!sc) + return; + if (sc->next_return == NULL || + list_empty(&sc->dir_obj->variant.dir_variant.children)) + sc->next_return = NULL; + else { + struct list_head *next = sc->next_return->siblings.next; - yaffs_gross_unlock(dev); + if (next == &sc->dir_obj->variant.dir_variant.children) + sc->next_return = NULL; /* end of list */ + else + sc->next_return = + list_entry(next, struct yaffs_obj, siblings); + } } - -static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin) +/* + * yaffs_remove_obj_callback() is called when an object is unlinked. + * We check open search contexts and advance any which are currently + * on the object being iterated. + */ +static void yaffs_remove_obj_callback(struct yaffs_obj *obj) { - long long retval; - lock_kernel(); + struct list_head *i; + struct yaffs_search_context *sc; + struct list_head *search_contexts = + &(yaffs_dev_to_lc(obj->my_dev)->search_contexts); - switch (origin){ - case 2: - offset += i_size_read(file->f_path.dentry->d_inode); - break; - case 1: - offset += file->f_pos; + /* Iterate through the directory search contexts. + * If any are currently on the object being removed, then advance + * the search context to the next object to prevent a hanging pointer. + */ + list_for_each(i, search_contexts) { + if (i) { + sc = list_entry(i, struct yaffs_search_context, others); + if (sc->next_return == obj) + yaffs_search_advance(sc); + } } - retval = -EINVAL; - if (offset >= 0){ - if (offset != file->f_pos) - file->f_pos = offset; - - retval = offset; - } - unlock_kernel(); - return retval; } - static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) { struct yaffs_obj *obj; struct yaffs_dev *dev; - struct yaffs_search_context *sc; + struct yaffs_search_context *sc; struct inode *inode = f->f_dentry->d_inode; unsigned long offset, curoffs; struct yaffs_obj *l; - int ret_val = 0; + int ret_val = 0; char name[YAFFS_MAX_NAME_LENGTH + 1]; @@ -1191,20 +816,21 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) offset = f->f_pos; - sc = yaffs_new_search(obj); - if(!sc){ - ret_val = -ENOMEM; - goto out; - } + sc = yaffs_new_search(obj); + if (!sc) { + ret_val = -ENOMEM; + goto out; + } - T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset)); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: starting at %d", (int)offset); if (offset == 0) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: entry . ino %d \n"), - (int)inode->i_ino)); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: entry . ino %d", + (int)inode->i_ino); yaffs_gross_unlock(dev); - if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){ + if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) { yaffs_gross_lock(dev); goto out; } @@ -1213,12 +839,13 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) f->f_pos++; } if (offset == 1) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: entry .. ino %d \n"), - (int)f->f_dentry->d_parent->d_inode->i_ino)); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: entry .. ino %d", + (int)f->f_dentry->d_parent->d_inode->i_ino); yaffs_gross_unlock(dev); if (filldir(dirent, "..", 2, offset, - f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){ + f->f_dentry->d_parent->d_inode->i_ino, + DT_DIR) < 0) { yaffs_gross_lock(dev); goto out; } @@ -1237,498 +864,603 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) f->f_version = inode->i_version; } - while(sc->next_return){ + while (sc->next_return) { curoffs++; - l = sc->next_return; + l = sc->next_return; if (curoffs >= offset) { - int this_inode = yaffs_get_obj_inode(l); - int this_type = yaffs_get_obj_type(l); + int this_inode = yaffs_get_obj_inode(l); + int this_type = yaffs_get_obj_type(l); - yaffs_get_obj_name(l, name, - YAFFS_MAX_NAME_LENGTH + 1); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: %s inode %d\n"), - name, yaffs_get_obj_inode(l))); + yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: %s inode %d", + name, yaffs_get_obj_inode(l)); - yaffs_gross_unlock(dev); + yaffs_gross_unlock(dev); if (filldir(dirent, - name, - strlen(name), - offset, - this_inode, - this_type) < 0){ + name, + strlen(name), + offset, this_inode, this_type) < 0) { yaffs_gross_lock(dev); goto out; } - yaffs_gross_lock(dev); + yaffs_gross_lock(dev); offset++; f->f_pos++; } - yaffs_search_advance(sc); + yaffs_search_advance(sc); + } + +out: + yaffs_search_end(sc); + yaffs_dev_to_lc(dev)->readdir_process = NULL; + yaffs_gross_unlock(dev); + + return ret_val; +} + +static const struct file_operations yaffs_dir_operations = { + .read = generic_read_dir, + .readdir = yaffs_readdir, + .fsync = yaffs_sync_object, + .llseek = generic_file_llseek, +}; + + + +static int yaffs_file_flush(struct file *file, fl_owner_t id) +{ + struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry); + + struct yaffs_dev *dev = obj->my_dev; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_flush object %d (%s)", + obj->obj_id, obj->dirty ? "dirty" : "clean"); + + yaffs_gross_lock(dev); + + yaffs_flush_file(obj, 1, 0); + + yaffs_gross_unlock(dev); + + return 0; +} + +static const struct file_operations yaffs_file_operations = { + .read = do_sync_read, + .write = do_sync_write, + .aio_read = generic_file_aio_read, + .aio_write = generic_file_aio_write, + .mmap = generic_file_mmap, + .flush = yaffs_file_flush, + .fsync = yaffs_sync_object, + .splice_read = generic_file_splice_read, + .splice_write = generic_file_splice_write, + .llseek = generic_file_llseek, +}; + + +/* ExportFS support */ +static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, + uint32_t generation) +{ + return yaffs_iget(sb, ino); +} + +static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb, + struct fid *fid, int fh_len, + int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + yaffs2_nfs_get_inode); +} + +static struct dentry *yaffs2_fh_to_parent(struct super_block *sb, + struct fid *fid, int fh_len, + int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + yaffs2_nfs_get_inode); +} + +struct dentry *yaffs2_get_parent(struct dentry *dentry) +{ + + struct super_block *sb = dentry->d_inode->i_sb; + struct dentry *parent = ERR_PTR(-ENOENT); + struct inode *inode; + unsigned long parent_ino; + struct yaffs_obj *d_obj; + struct yaffs_obj *parent_obj; + + d_obj = yaffs_inode_to_obj(dentry->d_inode); + + if (d_obj) { + parent_obj = d_obj->parent; + if (parent_obj) { + parent_ino = yaffs_get_obj_inode(parent_obj); + inode = yaffs_iget(sb, parent_ino); + + if (IS_ERR(inode)) { + parent = ERR_CAST(inode); + } else { + parent = d_obtain_alias(inode); + if (!IS_ERR(parent)) { + parent = ERR_PTR(-ENOMEM); + iput(inode); + } + } + } + } + + return parent; +} + +/* Just declare a zero structure as a NULL value implies + * using the default functions of exportfs. + */ + +static struct export_operations yaffs_export_ops = { + .fh_to_dentry = yaffs2_fh_to_dentry, + .fh_to_parent = yaffs2_fh_to_parent, + .get_parent = yaffs2_get_parent, +}; + + +/*-----------------------------------------------------------------*/ + +static int yaffs_readlink(struct dentry *dentry, char __user * buffer, + int buflen) +{ + unsigned char *alias; + int ret; + + struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; + + yaffs_gross_lock(dev); + + alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); + + yaffs_gross_unlock(dev); + + if (!alias) + return -ENOMEM; + + ret = vfs_readlink(dentry, buffer, buflen, alias); + kfree(alias); + return ret; +} + +static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + unsigned char *alias; + void *ret; + struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; + + yaffs_gross_lock(dev); + + alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); + yaffs_gross_unlock(dev); + + if (!alias) { + ret = ERR_PTR(-ENOMEM); + goto out; } -out: - yaffs_search_end(sc); - yaffs_dev_to_lc(dev)->readdir_process = NULL; - yaffs_gross_unlock(dev); + nd_set_link(nd, alias); + ret = (void *)alias; +out: + return ret; +} + +void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) +{ + kfree(alias); +} + + +static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj) +{ + /* Clear the association between the inode and + * the struct yaffs_obj. + */ + obj->my_inode = NULL; + yaffs_inode_to_obj_lv(inode) = NULL; + + /* If the object freeing was deferred, then the real + * free happens now. + * This should fix the inode inconsistency problem. + */ + yaffs_handle_defered_free(obj); +} + +/* yaffs_evict_inode combines into one operation what was previously done in + * yaffs_clear_inode() and yaffs_delete_inode() + * + */ +static void yaffs_evict_inode(struct inode *inode) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + int deleteme = 0; + + obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_evict_inode: ino %d, count %d %s", + (int)inode->i_ino, + atomic_read(&inode->i_count), + obj ? "object exists" : "null object"); - return ret_val; -} + if (!inode->i_nlink && !is_bad_inode(inode)) + deleteme = 1; + truncate_inode_pages(&inode->i_data, 0); + end_writeback(inode); + if (deleteme && obj) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + yaffs_del_obj(obj); + yaffs_gross_unlock(dev); + } + if (obj) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + yaffs_unstitch_obj(inode, obj); + yaffs_gross_unlock(dev); + } +} -/* - * File creation. Allocate an inode, and we're done.. - */ +static void yaffs_touch_super(struct yaffs_dev *dev) +{ + struct super_block *sb = yaffs_dev_to_lc(dev)->super; -#define YCRED(x) (x->cred) + yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb); + if (sb) + sb->s_dirt = 1; +} -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - dev_t rdev) +static int yaffs_readpage_nolock(struct file *f, struct page *pg) { - struct inode *inode; + /* Lifted from jffs2 */ - struct yaffs_obj *obj = NULL; - struct yaffs_dev *dev; + struct yaffs_obj *obj; + unsigned char *pg_buf; + int ret; - struct yaffs_obj *parent = yaffs_inode_to_obj(dir); + struct yaffs_dev *dev; - int error = -ENOSPC; - uid_t uid = YCRED(current)->fsuid; - gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readpage_nolock at %08x, size %08x", + (unsigned)(pg->index << PAGE_CACHE_SHIFT), + (unsigned)PAGE_CACHE_SIZE); - if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) - mode |= S_ISGID; + obj = yaffs_dentry_to_obj(f->f_dentry); - if (parent) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: parent object %d type %d\n"), - parent->obj_id, parent->variant_type)); - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: could not get parent object\n"))); - return -EPERM; - } + dev = obj->my_dev; - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, " - "mode %x dev %x\n"), - dentry->d_name.name, mode, rdev)); + BUG_ON(!PageLocked(pg)); - dev = parent->my_dev; + pg_buf = kmap(pg); + /* FIXME: Can kmap fail? */ yaffs_gross_lock(dev); - switch (mode & S_IFMT) { - default: - /* Special (socket, fifo, device...) */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n"))); - obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid, - gid, old_encode_dev(rdev)); - break; - case S_IFREG: /* file */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n"))); - obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid, - gid); - break; - case S_IFDIR: /* directory */ - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: making directory\n"))); - obj = yaffs_create_dir(parent, dentry->d_name.name, mode, - uid, gid); - break; - case S_IFLNK: /* symlink */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n"))); - obj = NULL; /* Do we ever get here? */ - break; - } + ret = yaffs_file_rd(obj, pg_buf, + pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); - /* Can not call yaffs_get_inode() with gross lock held */ yaffs_gross_unlock(dev); - if (obj) { - inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod created object %d count = %d\n"), - obj->obj_id, atomic_read(&inode->i_count))); - error = 0; - yaffs_fill_inode_from_obj(dir,parent); + if (ret >= 0) + ret = 0; + + if (ret) { + ClearPageUptodate(pg); + SetPageError(pg); } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod failed making object\n"))); - error = -ENOMEM; + SetPageUptodate(pg); + ClearPageError(pg); } - return error; + flush_dcache_page(pg); + kunmap(pg); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done"); + return ret; } -static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) +static int yaffs_readpage_unlock(struct file *f, struct page *pg) { - int ret_val; - T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n"))); - ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); - return ret_val; + int ret = yaffs_readpage_nolock(f, pg); + UnlockPage(pg); + return ret; } -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *n) +static int yaffs_readpage(struct file *f, struct page *pg) { - T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n"))); - return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); + int ret; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage"); + ret = yaffs_readpage_unlock(f, pg); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done"); + return ret; } -static int yaffs_unlink(struct inode *dir, struct dentry *dentry) -{ - int ret_val; +/* writepage inspired by/stolen from smbfs */ +static int yaffs_writepage(struct page *page, struct writeback_control *wbc) +{ struct yaffs_dev *dev; + struct address_space *mapping = page->mapping; + struct inode *inode; + unsigned long end_index; + char *buffer; struct yaffs_obj *obj; + int n_written = 0; + unsigned n_bytes; + loff_t i_size; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_unlink %d:%s\n"), - (int)(dir->i_ino), - dentry->d_name.name)); - obj = yaffs_inode_to_obj(dir); - dev = obj->my_dev; + if (!mapping) + BUG(); + inode = mapping->host; + if (!inode) + BUG(); + i_size = i_size_read(inode); - yaffs_gross_lock(dev); + end_index = i_size >> PAGE_CACHE_SHIFT; - ret_val = yaffs_unlinker(obj, dentry->d_name.name); + if (page->index < end_index) + n_bytes = PAGE_CACHE_SIZE; + else { + n_bytes = i_size & (PAGE_CACHE_SIZE - 1); - if (ret_val == YAFFS_OK) { - dentry->d_inode->i_nlink--; - dir->i_version++; - yaffs_gross_unlock(dev); - mark_inode_dirty(dentry->d_inode); - update_dir_time(dir); - return 0; + if (page->index > end_index || !n_bytes) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_writepage at %08x, inode size = %08x!!!", + (unsigned)(page->index << PAGE_CACHE_SHIFT), + (unsigned)inode->i_size); + yaffs_trace(YAFFS_TRACE_OS, + " -> don't care!!"); + + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + set_page_writeback(page); + unlock_page(page); + end_page_writeback(page); + return 0; + } } - yaffs_gross_unlock(dev); - return -ENOTEMPTY; -} -/* - * Create a link... - */ -static int yaffs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - struct inode *inode = old_dentry->d_inode; - struct yaffs_obj *obj = NULL; - struct yaffs_obj *link = NULL; - struct yaffs_dev *dev; + if (n_bytes != PAGE_CACHE_SIZE) + zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE); + + get_page(page); - T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n"))); + buffer = kmap(page); obj = yaffs_inode_to_obj(inode); dev = obj->my_dev; - yaffs_gross_lock(dev); - if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ - link = yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name, - obj); - - if (link) { - old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj); - d_instantiate(dentry, old_dentry->d_inode); - atomic_inc(&old_dentry->d_inode->i_count); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_link link count %d i_count %d\n"), - old_dentry->d_inode->i_nlink, - atomic_read(&old_dentry->d_inode->i_count))); - } - - yaffs_gross_unlock(dev); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_writepage at %08x, size %08x", + (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes); + yaffs_trace(YAFFS_TRACE_OS, + "writepag0: obj = %05x, ino = %05x", + (int)obj->variant.file_variant.file_size, (int)inode->i_size); - if (link){ - update_dir_time(dir); - return 0; - } - - return -EPERM; -} + n_written = yaffs_wr_file(obj, buffer, + page->index << PAGE_CACHE_SHIFT, n_bytes, 0); -static int yaffs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - uid_t uid = YCRED(current)->fsuid; - gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; + yaffs_touch_super(dev); - T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n"))); + yaffs_trace(YAFFS_TRACE_OS, + "writepag1: obj = %05x, ino = %05x", + (int)obj->variant.file_variant.file_size, (int)inode->i_size); - dev = yaffs_inode_to_obj(dir)->my_dev; - yaffs_gross_lock(dev); - obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name, - S_IFLNK | S_IRWXUGO, uid, gid, symname); yaffs_gross_unlock(dev); - if (obj) { - struct inode *inode; - - inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n"))); - return 0; - } else { - T(YAFFS_TRACE_OS, (TSTR("symlink not created\n"))); - } + kunmap(page); + set_page_writeback(page); + unlock_page(page); + end_page_writeback(page); + put_page(page); - return -ENOMEM; + return (n_written == n_bytes) ? 0 : -ENOSPC; } -static int yaffs_sync_object(struct file *file, int datasync) -{ +/* Space holding and freeing is done to ensure we have space available for + * write_begin/end. + * For now we just assume few parallel writes and check against a small + * number. + * Todo: need to do this with a counter to handle parallel reads better. + */ +static ssize_t yaffs_hold_space(struct file *f) +{ struct yaffs_obj *obj; struct yaffs_dev *dev; - struct dentry *dentry = file->f_path.dentry; - - obj = yaffs_dentry_to_obj(dentry); - - dev = obj->my_dev; - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, - (TSTR("yaffs_sync_object\n"))); - yaffs_gross_lock(dev); - yaffs_flush_file(obj, 1, datasync); - yaffs_gross_unlock(dev); - return 0; -} + int n_free_chunks; -/* - * The VFS layer already does all the dentry stuff for rename. - * - * NB: POSIX says you can rename an object over an old object of the same name - */ -static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - struct yaffs_dev *dev; - int ret_val = YAFFS_FAIL; - struct yaffs_obj *target; + obj = yaffs_dentry_to_obj(f->f_dentry); - T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n"))); - dev = yaffs_inode_to_obj(old_dir)->my_dev; + dev = obj->my_dev; yaffs_gross_lock(dev); - /* Check if the target is an existing directory that is not empty. */ - target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir), - new_dentry->d_name.name); - - - - if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && - !ylist_empty(&target->variant.dir_variant.children)) { - - T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n"))); - - ret_val = YAFFS_FAIL; - } else { - /* Now does unlinking internally using shadowing mechanism */ - T(YAFFS_TRACE_OS, (TSTR("calling yaffs_rename_obj\n"))); - - ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir), - old_dentry->d_name.name, - yaffs_inode_to_obj(new_dir), - new_dentry->d_name.name); - } - yaffs_gross_unlock(dev); + n_free_chunks = yaffs_get_n_free_chunks(dev); - if (ret_val == YAFFS_OK) { - if (target) { - new_dentry->d_inode->i_nlink--; - mark_inode_dirty(new_dentry->d_inode); - } - - update_dir_time(old_dir); - if(old_dir != new_dir) - update_dir_time(new_dir); - return 0; - } else { - return -ENOTEMPTY; - } + yaffs_gross_unlock(dev); + + return (n_free_chunks > 20) ? 1 : 0; } -static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) +static void yaffs_release_space(struct file *f) { - struct inode *inode = dentry->d_inode; - int error = 0; + struct yaffs_obj *obj; struct yaffs_dev *dev; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setattr of object %d\n"), - yaffs_inode_to_obj(inode)->obj_id)); - - /* Fail if a requested resize >= 2GB */ - if (attr->ia_valid & ATTR_SIZE && - (attr->ia_size >> 31)) - error = -EINVAL; - - if (error == 0) - error = inode_change_ok(inode, attr); - if (error == 0) { - int result; - if (!error){ - error = yaffs_vfs_setattr(inode, attr); - T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n"))); - if (attr->ia_valid & ATTR_SIZE){ - yaffs_vfs_setsize(inode,attr->ia_size); - inode->i_blocks = (inode->i_size + 511) >> 9; - } - } - dev = yaffs_inode_to_obj(inode)->my_dev; - if (attr->ia_valid & ATTR_SIZE){ - T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"), - (int)(attr->ia_size),(int)(attr->ia_size))); - } - yaffs_gross_lock(dev); - result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr); - if(result == YAFFS_OK) { - error = 0; - } else { - error = -EPERM; - } - yaffs_gross_unlock(dev); + obj = yaffs_dentry_to_obj(f->f_dentry); - } + dev = obj->my_dev; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setattr done returning %d\n"),error)); + yaffs_gross_lock(dev); - return error; + yaffs_gross_unlock(dev); } -#ifdef CONFIG_YAFFS_XATTR -int yaffs_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags) +static int yaffs_write_begin(struct file *filp, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) { - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + struct page *pg = NULL; + pgoff_t index = pos >> PAGE_CACHE_SHIFT; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setxattr of object %d\n"), - obj->obj_id)); + int ret = 0; + int space_held = 0; + /* Get a page */ + pg = grab_cache_page_write_begin(mapping, index, flags); - if (error == 0) { - int result; - dev = obj->my_dev; - yaffs_gross_lock(dev); - result = yaffs_set_xattrib(obj, name, value, size, flags); - if(result == YAFFS_OK) - error = 0; - else if(result < 0) - error = result; - yaffs_gross_unlock(dev); + *pagep = pg; + if (!pg) { + ret = -ENOMEM; + goto out; + } + yaffs_trace(YAFFS_TRACE_OS, + "start yaffs_write_begin index %d(%x) uptodate %d", + (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0); + /* Get fs space */ + space_held = yaffs_hold_space(filp); + + if (!space_held) { + ret = -ENOSPC; + goto out; } - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setxattr done returning %d\n"),error)); - return error; -} + /* Update page if required */ + if (!Page_Uptodate(pg)) + ret = yaffs_readpage_nolock(filp, pg); -ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff, - size_t size) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + if (ret) + goto out; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_getxattr \"%s\" from object %d\n"), - name, obj->obj_id)); + /* Happy path return */ + yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok"); - if (error == 0) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - error = yaffs_get_xattrib(obj, name, buff, size); - yaffs_gross_unlock(dev); + return 0; +out: + yaffs_trace(YAFFS_TRACE_OS, + "end yaffs_write_begin fail returning %d", ret); + if (space_held) + yaffs_release_space(filp); + if (pg) { + unlock_page(pg); + page_cache_release(pg); } - T(YAFFS_TRACE_OS, - (TSTR("yaffs_getxattr done returning %d\n"),error)); - - return error; + return ret; } -int yaffs_removexattr(struct dentry *dentry, const char *name) +static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, + loff_t * pos) { - struct inode *inode = dentry->d_inode; - int error = 0; + struct yaffs_obj *obj; + int n_written, ipos; + struct inode *inode; struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_removexattr of object %d\n"), - obj->obj_id)); + obj = yaffs_dentry_to_obj(f->f_dentry); + dev = obj->my_dev; - if (error == 0) { - int result; - dev = obj->my_dev; - yaffs_gross_lock(dev); - result = yaffs_remove_xattrib(obj, name); - if(result == YAFFS_OK) - error = 0; - else if(result < 0) - error = result; - yaffs_gross_unlock(dev); + yaffs_gross_lock(dev); - } - T(YAFFS_TRACE_OS, - (TSTR("yaffs_removexattr done returning %d\n"),error)); + inode = f->f_dentry->d_inode; - return error; + if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) + ipos = inode->i_size; + else + ipos = *pos; + + if (!obj) + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write: hey obj is null!"); + else + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)", + (unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos); + + n_written = yaffs_wr_file(obj, buf, ipos, n, 0); + + yaffs_touch_super(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write: %d(%x) bytes written", + (unsigned)n, (unsigned)n); + + if (n_written > 0) { + ipos += n_written; + *pos = ipos; + if (ipos > inode->i_size) { + inode->i_size = ipos; + inode->i_blocks = (ipos + 511) >> 9; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write size updated to %d bytes, %d blocks", + ipos, (int)(inode->i_blocks)); + } + + } + yaffs_gross_unlock(dev); + return (n_written == 0) && (n > 0) ? -ENOSPC : n_written; } -ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size) +static int yaffs_write_end(struct file *filp, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *pg, void *fsdadata) { - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + int ret = 0; + void *addr, *kva; + uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_listxattr of object %d\n"), - obj->obj_id)); + kva = kmap(pg); + addr = kva + offset_into_page; + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_write_end addr %p pos %x n_bytes %d", + addr, (unsigned)pos, copied); - if (error == 0) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - error = yaffs_list_xattrib(obj, buff, size); - yaffs_gross_unlock(dev); + ret = yaffs_file_write(filp, addr, copied, &pos); + if (ret != copied) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_write_end not same size ret %d copied %d", + ret, copied); + SetPageError(pg); } - T(YAFFS_TRACE_OS, - (TSTR("yaffs_listxattr done returning %d\n"),error)); - - return error; -} -#endif + kunmap(pg); + yaffs_release_space(filp); + unlock_page(pg); + page_cache_release(pg); + return ret; +} static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; struct super_block *sb = dentry->d_sb; - T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs"); yaffs_gross_lock(dev); @@ -1742,14 +1474,17 @@ static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) uint64_t bytes_in_dev; uint64_t bytes_free; - bytes_in_dev = ((uint64_t)((dev->param.end_block - dev->param.start_block + 1))) * - ((uint64_t)(dev->param.chunks_per_block * dev->data_bytes_per_chunk)); + bytes_in_dev = + ((uint64_t) + ((dev->param.end_block - dev->param.start_block + + 1))) * ((uint64_t) (dev->param.chunks_per_block * + dev->data_bytes_per_chunk)); - do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */ + do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */ buf->f_blocks = bytes_in_dev; - bytes_free = ((uint64_t)(yaffs_get_n_free_chunks(dev))) * - ((uint64_t)(dev->data_bytes_per_chunk)); + bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) * + ((uint64_t) (dev->data_bytes_per_chunk)); do_div(bytes_free, sb->s_blocksize); @@ -1758,21 +1493,21 @@ static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) } else if (sb->s_blocksize > dev->data_bytes_per_chunk) { buf->f_blocks = - (dev->param.end_block - dev->param.start_block + 1) * - dev->param.chunks_per_block / - (sb->s_blocksize / dev->data_bytes_per_chunk); + (dev->param.end_block - dev->param.start_block + 1) * + dev->param.chunks_per_block / + (sb->s_blocksize / dev->data_bytes_per_chunk); buf->f_bfree = - yaffs_get_n_free_chunks(dev) / - (sb->s_blocksize / dev->data_bytes_per_chunk); + yaffs_get_n_free_chunks(dev) / + (sb->s_blocksize / dev->data_bytes_per_chunk); } else { buf->f_blocks = - (dev->param.end_block - dev->param.start_block + 1) * - dev->param.chunks_per_block * - (dev->data_bytes_per_chunk / sb->s_blocksize); + (dev->param.end_block - dev->param.start_block + 1) * + dev->param.chunks_per_block * + (dev->data_bytes_per_chunk / sb->s_blocksize); buf->f_bfree = - yaffs_get_n_free_chunks(dev) * - (dev->data_bytes_per_chunk / sb->s_blocksize); + yaffs_get_n_free_chunks(dev) * + (dev->data_bytes_per_chunk / sb->s_blocksize); } buf->f_files = 0; @@ -1783,61 +1518,57 @@ static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } - - static void yaffs_flush_inodes(struct super_block *sb) { struct inode *iptr; struct yaffs_obj *obj; - - list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){ + + list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) { obj = yaffs_inode_to_obj(iptr); - if(obj){ - T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"), - obj->obj_id)); - yaffs_flush_file(obj,1,0); + if (obj) { + yaffs_trace(YAFFS_TRACE_OS, + "flushing obj %d", obj->obj_id); + yaffs_flush_file(obj, 1, 0); } } } - static void yaffs_flush_super(struct super_block *sb, int do_checkpoint) { - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - if(!dev) + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + if (!dev) return; - + yaffs_flush_inodes(sb); yaffs_update_dirty_dirs(dev); yaffs_flush_whole_cache(dev); - if(do_checkpoint) + if (do_checkpoint) yaffs_checkpoint_save(dev); } - static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev) { - unsigned erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; + unsigned erased_chunks = + dev->n_erased_blocks * dev->param.chunks_per_block; struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - unsigned scattered = 0; /* Free chunks not in an erased block */ + unsigned scattered = 0; /* Free chunks not in an erased block */ - if(erased_chunks < dev->n_free_chunks) + if (erased_chunks < dev->n_free_chunks) scattered = (dev->n_free_chunks - erased_chunks); - if(!context->bg_running) + if (!context->bg_running) return 0; - else if(scattered < (dev->param.chunks_per_block * 2)) + else if (scattered < (dev->param.chunks_per_block * 2)) return 0; - else if(erased_chunks > dev->n_free_chunks/2) + else if (erased_chunks > dev->n_free_chunks / 2) return 0; - else if(erased_chunks > dev->n_free_chunks/4) + else if (erased_chunks > dev->n_free_chunks / 4) return 1; else return 2; } -static int yaffs_do_sync_fs(struct super_block *sb, - int request_checkpoint) +static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint) { struct yaffs_dev *dev = yaffs_super_to_dev(sb); @@ -1845,22 +1576,21 @@ static int yaffs_do_sync_fs(struct super_block *sb, unsigned gc_urgent = yaffs_bg_gc_urgency(dev); int do_checkpoint; - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"), + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, + "yaffs_do_sync_fs: gc-urgency %d %s %s%s", gc_urgent, sb->s_dirt ? "dirty" : "clean", request_checkpoint ? "checkpoint requested" : "no checkpoint", - oneshot_checkpoint ? " one-shot" : "" )); + oneshot_checkpoint ? " one-shot" : ""); yaffs_gross_lock(dev); do_checkpoint = ((request_checkpoint && !gc_urgent) || - oneshot_checkpoint) && - !dev->is_checkpointed; + oneshot_checkpoint) && !dev->is_checkpointed; if (sb->s_dirt || do_checkpoint) { yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint); sb->s_dirt = 0; - if(oneshot_checkpoint) + if (oneshot_checkpoint) yaffs_auto_checkpoint &= ~4; } yaffs_gross_unlock(dev); @@ -1880,7 +1610,6 @@ static int yaffs_do_sync_fs(struct super_block *sb, * The thread should not do any writing while the fs is in read only. */ - void yaffs_background_waker(unsigned long data) { wake_up_process((struct task_struct *)data); @@ -1899,220 +1628,132 @@ static int yaffs_bg_thread_fn(void *data) int gc_result; struct timer_list timer; - T(YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_background starting for dev %p\n"), - (void *)dev)); + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "yaffs_background starting for dev %p", (void *)dev); set_freezable(); - while(context->bg_running){ - T(YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_background\n"))); + while (context->bg_running) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background"); - if(kthread_should_stop()) + if (kthread_should_stop()) break; - if(try_to_freeze()) + if (try_to_freeze()) continue; yaffs_gross_lock(dev); now = jiffies; - if(time_after(now, next_dir_update) && yaffs_bg_enable){ + if (time_after(now, next_dir_update) && yaffs_bg_enable) { yaffs_update_dirty_dirs(dev); next_dir_update = now + HZ; } - if(time_after(now,next_gc) && yaffs_bg_enable){ - if(!dev->is_checkpointed){ + if (time_after(now, next_gc) && yaffs_bg_enable) { + if (!dev->is_checkpointed) { urgency = yaffs_bg_gc_urgency(dev); gc_result = yaffs_bg_gc(dev, urgency); - if(urgency > 1) - next_gc = now + HZ/20+1; - else if(urgency > 0) - next_gc = now + HZ/10+1; + if (urgency > 1) + next_gc = now + HZ / 20 + 1; + else if (urgency > 0) + next_gc = now + HZ / 10 + 1; else next_gc = now + HZ * 2; - } else /* - * gc not running so set to next_dir_update - * to cut down on wake ups - */ + } else { + /* + * gc not running so set to next_dir_update + * to cut down on wake ups + */ next_gc = next_dir_update; + } } yaffs_gross_unlock(dev); expires = next_dir_update; - if (time_before(next_gc,expires)) + if (time_before(next_gc, expires)) expires = next_gc; - if(time_before(expires,now)) + if (time_before(expires, now)) expires = now + HZ; Y_INIT_TIMER(&timer); - timer.expires = expires+1; - timer.data = (unsigned long) current; + timer.expires = expires + 1; + timer.data = (unsigned long)current; timer.function = yaffs_background_waker; - set_current_state(TASK_INTERRUPTIBLE); + set_current_state(TASK_INTERRUPTIBLE); add_timer(&timer); schedule(); del_timer_sync(&timer); - } - - return 0; -} - -static int yaffs_bg_start(struct yaffs_dev *dev) -{ - int retval = 0; - struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - - if(dev->read_only) - return -1; - - context->bg_running = 1; - - context->bg_thread = kthread_run(yaffs_bg_thread_fn, - (void *)dev,"yaffs-bg-%d",context->mount_id); - - if(IS_ERR(context->bg_thread)){ - retval = PTR_ERR(context->bg_thread); - context->bg_thread = NULL; - context->bg_running = 0; - } - return retval; -} - -static void yaffs_bg_stop(struct yaffs_dev *dev) -{ - struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev); - - ctxt->bg_running = 0; - - if( ctxt->bg_thread){ - kthread_stop(ctxt->bg_thread); - ctxt->bg_thread = NULL; - } -} - - -static void yaffs_write_super(struct super_block *sb) -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_write_super%s\n"), - request_checkpoint ? " checkpt" : "")); - - yaffs_do_sync_fs(sb, request_checkpoint); - -} - - -static int yaffs_sync_fs(struct super_block *sb, int wait) -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, - (TSTR("yaffs_sync_fs%s\n"), - request_checkpoint ? " checkpt" : "")); - - yaffs_do_sync_fs(sb, request_checkpoint); - - return 0; -} - -static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) -{ - struct inode *inode; - struct yaffs_obj *obj; - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_iget for %lu\n"), ino)); - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - /* NB This is called as a side effect of other functions, but - * we had to release the lock to prevent deadlocks, so - * need to lock again. - */ - - yaffs_gross_lock(dev); - - obj = yaffs_find_by_number(dev, inode->i_ino); - - yaffs_fill_inode_from_obj(inode, obj); - - yaffs_gross_unlock(dev); - - unlock_new_inode(inode); - return inode; -} + } -static YLIST_HEAD(yaffs_context_list); -struct semaphore yaffs_context_lock; + return 0; +} -static void yaffs_put_super(struct super_block *sb) +static int yaffs_bg_start(struct yaffs_dev *dev) { - struct yaffs_dev *dev = yaffs_super_to_dev(sb); + int retval = 0; + struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n"))); + if (dev->read_only) + return -1; - T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - (TSTR("Shutting down yaffs background thread\n"))); - yaffs_bg_stop(dev); - T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs background thread shut down\n"))); + context->bg_running = 1; - yaffs_gross_lock(dev); + context->bg_thread = kthread_run(yaffs_bg_thread_fn, + (void *)dev, "yaffs-bg-%d", + context->mount_id); - yaffs_flush_super(sb,1); + if (IS_ERR(context->bg_thread)) { + retval = PTR_ERR(context->bg_thread); + context->bg_thread = NULL; + context->bg_running = 0; + } + return retval; +} - if (yaffs_dev_to_lc(dev)->put_super_fn) - yaffs_dev_to_lc(dev)->put_super_fn(sb); +static void yaffs_bg_stop(struct yaffs_dev *dev) +{ + struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev); + ctxt->bg_running = 0; - yaffs_deinitialise(dev); + if (ctxt->bg_thread) { + kthread_stop(ctxt->bg_thread); + ctxt->bg_thread = NULL; + } +} - yaffs_gross_unlock(dev); +static void yaffs_write_super(struct super_block *sb) +{ + unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); - down(&yaffs_context_lock); - ylist_del_init(&(yaffs_dev_to_lc(dev)->context_list)); - up(&yaffs_context_lock); + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, + "yaffs_write_super%s", + request_checkpoint ? " checkpt" : ""); - if (yaffs_dev_to_lc(dev)->spare_buffer) { - YFREE(yaffs_dev_to_lc(dev)->spare_buffer); - yaffs_dev_to_lc(dev)->spare_buffer = NULL; - } + yaffs_do_sync_fs(sb, request_checkpoint); - kfree(dev); } - -static void yaffs_mtd_put_super(struct super_block *sb) +static int yaffs_sync_fs(struct super_block *sb, int wait) { - struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb)); + unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); - if (mtd->sync) - mtd->sync(mtd); + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, + "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : ""); - put_mtd_device(mtd); + yaffs_do_sync_fs(sb, request_checkpoint); + + return 0; } -static void yaffs_touch_super(struct yaffs_dev *dev) -{ - struct super_block *sb = yaffs_dev_to_lc(dev)->super; +static LIST_HEAD(yaffs_context_list); +struct mutex yaffs_context_lock; - T(YAFFS_TRACE_OS, (TSTR("yaffs_touch_super() sb = %p\n"), sb)); - if (sb) - sb->s_dirt = 1; -} -typedef struct { + +struct yaffs_options { int inband_tags; int skip_checkpoint_read; int skip_checkpoint_write; @@ -2123,10 +1764,11 @@ typedef struct { int lazy_loading_overridden; int empty_lost_and_found; int empty_lost_and_found_overridden; -} yaffs_options; +}; #define MAX_OPT_LEN 30 -static int yaffs_parse_options(yaffs_options *options, const char *options_str) +static int yaffs_parse_options(struct yaffs_options *options, + const char *options_str) { char cur_opt[MAX_OPT_LEN + 1]; int p; @@ -2138,7 +1780,7 @@ static int yaffs_parse_options(yaffs_options *options, const char *options_str) memset(cur_opt, 0, MAX_OPT_LEN + 1); p = 0; - while(*options_str == ',') + while (*options_str == ',') options_str++; while (*options_str && *options_str != ',') { @@ -2149,38 +1791,38 @@ static int yaffs_parse_options(yaffs_options *options, const char *options_str) options_str++; } - if (!strcmp(cur_opt, "inband-tags")) + if (!strcmp(cur_opt, "inband-tags")) { options->inband_tags = 1; - else if (!strcmp(cur_opt, "tags-ecc-off")){ + } else if (!strcmp(cur_opt, "tags-ecc-off")) { options->tags_ecc_on = 0; - options->tags_ecc_overridden=1; - } else if (!strcmp(cur_opt, "tags-ecc-on")){ + options->tags_ecc_overridden = 1; + } else if (!strcmp(cur_opt, "tags-ecc-on")) { options->tags_ecc_on = 1; options->tags_ecc_overridden = 1; - } else if (!strcmp(cur_opt, "lazy-loading-off")){ + } else if (!strcmp(cur_opt, "lazy-loading-off")) { options->lazy_loading_enabled = 0; - options->lazy_loading_overridden=1; - } else if (!strcmp(cur_opt, "lazy-loading-on")){ + options->lazy_loading_overridden = 1; + } else if (!strcmp(cur_opt, "lazy-loading-on")) { options->lazy_loading_enabled = 1; options->lazy_loading_overridden = 1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){ + } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) { options->empty_lost_and_found = 0; - options->empty_lost_and_found_overridden=1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){ + options->empty_lost_and_found_overridden = 1; + } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) { options->empty_lost_and_found = 1; - options->empty_lost_and_found_overridden=1; - } else if (!strcmp(cur_opt, "no-cache")) + options->empty_lost_and_found_overridden = 1; + } else if (!strcmp(cur_opt, "no-cache")) { options->no_cache = 1; - else if (!strcmp(cur_opt, "no-checkpoint-read")) + } else if (!strcmp(cur_opt, "no-checkpoint-read")) { options->skip_checkpoint_read = 1; - else if (!strcmp(cur_opt, "no-checkpoint-write")) + } else if (!strcmp(cur_opt, "no-checkpoint-write")) { options->skip_checkpoint_write = 1; - else if (!strcmp(cur_opt, "no-checkpoint")) { + } else if (!strcmp(cur_opt, "no-checkpoint")) { options->skip_checkpoint_read = 1; options->skip_checkpoint_write = 1; } else { printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", - cur_opt); + cur_opt); error = 1; } } @@ -2188,9 +1830,185 @@ static int yaffs_parse_options(yaffs_options *options, const char *options_str) return error; } +static struct address_space_operations yaffs_file_address_operations = { + .readpage = yaffs_readpage, + .writepage = yaffs_writepage, + .write_begin = yaffs_write_begin, + .write_end = yaffs_write_end, +}; + + + +static const struct inode_operations yaffs_file_inode_operations = { + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; + +static const struct inode_operations yaffs_symlink_inode_operations = { + .readlink = yaffs_readlink, + .follow_link = yaffs_follow_link, + .put_link = yaffs_put_link, + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; + +static void yaffs_fill_inode_from_obj(struct inode *inode, + struct yaffs_obj *obj) +{ + if (inode && obj) { + + /* Check mode against the variant type and attempt to repair if broken. */ + u32 mode = obj->yst_mode; + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + if (!S_ISREG(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFREG; + } + + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + if (!S_ISLNK(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFLNK; + } + + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + if (!S_ISDIR(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFDIR; + } + + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + case YAFFS_OBJECT_TYPE_HARDLINK: + case YAFFS_OBJECT_TYPE_SPECIAL: + default: + /* TODO? */ + break; + } + + inode->i_flags |= S_NOATIME; + + inode->i_ino = obj->obj_id; + inode->i_mode = obj->yst_mode; + inode->i_uid = obj->yst_uid; + inode->i_gid = obj->yst_gid; + + inode->i_rdev = old_decode_dev(obj->yst_rdev); + + inode->i_atime.tv_sec = (time_t) (obj->yst_atime); + inode->i_atime.tv_nsec = 0; + inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; + inode->i_mtime.tv_nsec = 0; + inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; + inode->i_ctime.tv_nsec = 0; + inode->i_size = yaffs_get_obj_length(obj); + inode->i_blocks = (inode->i_size + 511) >> 9; + + inode->i_nlink = yaffs_get_obj_link_count(obj); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_fill_inode mode %x uid %d gid %d size %d count %d", + inode->i_mode, inode->i_uid, inode->i_gid, + (int)inode->i_size, atomic_read(&inode->i_count)); + + switch (obj->yst_mode & S_IFMT) { + default: /* fifo, device or socket */ + init_special_inode(inode, obj->yst_mode, + old_decode_dev(obj->yst_rdev)); + break; + case S_IFREG: /* file */ + inode->i_op = &yaffs_file_inode_operations; + inode->i_fop = &yaffs_file_operations; + inode->i_mapping->a_ops = + &yaffs_file_address_operations; + break; + case S_IFDIR: /* directory */ + inode->i_op = &yaffs_dir_inode_operations; + inode->i_fop = &yaffs_dir_operations; + break; + case S_IFLNK: /* symlink */ + inode->i_op = &yaffs_symlink_inode_operations; + break; + } + + yaffs_inode_to_obj_lv(inode) = obj; + + obj->my_inode = inode; + + } else { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_fill_inode invalid parameters"); + } +} + +static void yaffs_put_super(struct super_block *sb) +{ + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super"); + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, + "Shutting down yaffs background thread"); + yaffs_bg_stop(dev); + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, + "yaffs background thread shut down"); + + yaffs_gross_lock(dev); + + yaffs_flush_super(sb, 1); + + if (yaffs_dev_to_lc(dev)->put_super_fn) + yaffs_dev_to_lc(dev)->put_super_fn(sb); + + yaffs_deinitialise(dev); + + yaffs_gross_unlock(dev); + mutex_lock(&yaffs_context_lock); + list_del_init(&(yaffs_dev_to_lc(dev)->context_list)); + mutex_unlock(&yaffs_context_lock); + + if (yaffs_dev_to_lc(dev)->spare_buffer) { + kfree(yaffs_dev_to_lc(dev)->spare_buffer); + yaffs_dev_to_lc(dev)->spare_buffer = NULL; + } + + kfree(dev); +} + +static void yaffs_mtd_put_super(struct super_block *sb) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb)); + + if (mtd->sync) + mtd->sync(mtd); + + put_mtd_device(mtd); +} + +static const struct super_operations yaffs_super_ops = { + .statfs = yaffs_statfs, + .put_super = yaffs_put_super, + .evict_inode = yaffs_evict_inode, + .sync_fs = yaffs_sync_fs, + .write_super = yaffs_write_super, +}; + static struct super_block *yaffs_internal_read_super(int yaffs_version, - struct super_block *sb, - void *data, int silent) + struct super_block *sb, + void *data, int silent) { int n_blocks; struct inode *inode = NULL; @@ -2205,18 +2023,18 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, int read_only = 0; - yaffs_options options; + struct yaffs_options options; unsigned mount_id; int found; struct yaffs_linux_context *context_iterator; - struct ylist_head *l; + struct list_head *l; sb->s_magic = YAFFS_MAGIC; sb->s_op = &yaffs_super_ops; sb->s_flags |= MS_NOATIME; - read_only =((sb->s_flags & MS_RDONLY) != 0); + read_only = ((sb->s_flags & MS_RDONLY) != 0); sb->s_export_op = &yaffs_export_ops; @@ -2229,8 +2047,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, else printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n", sb->s_dev, - yaffs_devname(sb, devname_buf), - read_only ? "ro" : "rw"); + yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw"); if (!data_str) data_str = ""; @@ -2244,20 +2061,18 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, return NULL; } - sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffs_version)); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: block size %d\n"), - (int)(sb->s_blocksize))); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: Using yaffs%d", yaffs_version); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: block size %d", (int)(sb->s_blocksize)); - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"), - MAJOR(sb->s_dev), MINOR(sb->s_dev), - yaffs_devname(sb, devname_buf))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Attempting MTD mount of %u.%u,\"%s\"", + MAJOR(sb->s_dev), MINOR(sb->s_dev), + yaffs_devname(sb, devname_buf)); /* Check it's an mtd device..... */ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) @@ -2266,46 +2081,44 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, /* Get the device */ mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); if (!mtd) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device #%u doesn't appear to exist\n"), - MINOR(sb->s_dev))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device #%u doesn't appear to exist", + MINOR(sb->s_dev)); return NULL; } /* Check it's NAND */ if (mtd->type != MTD_NANDFLASH) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device is not NAND it's type %d\n"), - mtd->type)); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device is not NAND it's type %d", + mtd->type); return NULL; } - T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase)); - T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read)); - T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write)); - T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob)); - T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob)); - T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad)); - T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad)); - T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd))); - T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize)); - T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize)); - T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size)); + yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase); + yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read); + yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write); + yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob); + yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob); + yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad); + yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad); + yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd)); + yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize); + yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize); + yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size); #ifdef CONFIG_YAFFS_AUTO_YAFFS2 if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: auto selecting yaffs2\n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2"); yaffs_version = 2; } /* Added NCB 26/5/2006 for completeness */ - if (yaffs_version == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: auto selecting yaffs1\n"))); + if (yaffs_version == 2 && !options.inband_tags + && WRITE_SIZE(mtd) == 512) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1"); yaffs_version = 1; } - #endif if (yaffs_version == 2) { @@ -2314,39 +2127,33 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, !mtd->block_isbad || !mtd->block_markbad || !mtd->read || - !mtd->write || - !mtd->read_oob || !mtd->write_oob) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support required " - "functions\n"))); + !mtd->write || !mtd->read_oob || !mtd->write_oob) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support required functions"); return NULL; } if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || - mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && + mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && !options.inband_tags) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not have the " - "right page sizes\n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not have the right page sizes"); return NULL; } } else { /* Check for V1 style functions */ if (!mtd->erase || !mtd->read || - !mtd->write || - !mtd->read_oob || !mtd->write_oob) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support required " - "functions\n"))); + !mtd->write || !mtd->read_oob || !mtd->write_oob) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support required functions"); return NULL; } if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || mtd->oobsize != YAFFS_BYTES_PER_SPARE) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support have the " - "right page sizes\n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support have the right page sizes"); return NULL; } } @@ -2356,19 +2163,20 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, * Set the struct yaffs_dev up for mtd */ - if (!read_only && !(mtd->flags & MTD_WRITEABLE)){ + if (!read_only && !(mtd->flags & MTD_WRITEABLE)) { read_only = 1; - printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only"); + printk(KERN_INFO + "yaffs: mtd is read only, setting superblock read only"); sb->s_flags |= MS_RDONLY; } dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL); - context = kmalloc(sizeof(struct yaffs_linux_context),GFP_KERNEL); - - if(!dev || !context ){ - if(dev) + context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL); + + if (!dev || !context) { + if (dev) kfree(dev); - if(context) + if (context) kfree(context); dev = NULL; context = NULL; @@ -2376,30 +2184,31 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, if (!dev) { /* Deep shit could not allocate device structure */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_read_super: Failed trying to allocate " - "struct yaffs_dev. \n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs_read_super failed trying to allocate yaffs_dev"); return NULL; } memset(dev, 0, sizeof(struct yaffs_dev)); param = &(dev->param); - memset(context,0,sizeof(struct yaffs_linux_context)); + memset(context, 0, sizeof(struct yaffs_linux_context)); dev->os_context = context; - YINIT_LIST_HEAD(&(context->context_list)); + INIT_LIST_HEAD(&(context->context_list)); context->dev = dev; context->super = sb; dev->read_only = read_only; sb->s_fs_info = dev; - + dev->driver_context = mtd; param->name = mtd->name; /* Set up the memory size parameters.... */ - n_blocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); + n_blocks = + YCALCBLOCKS(mtd->size, + (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); param->start_block = 0; param->end_block = n_blocks - 1; @@ -2415,7 +2224,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, #ifdef CONFIG_YAFFS_XATTR param->enable_xattr = 1; #endif - if(options.lazy_loading_overridden) + if (options.lazy_loading_overridden) param->disable_lazy_load = !options.lazy_loading_enabled; #ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC @@ -2427,7 +2236,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, param->defered_dir_update = 1; #endif - if(options.tags_ecc_overridden) + if (options.tags_ecc_overridden) param->no_tags_ecc = !options.tags_ecc_on; #ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND @@ -2444,18 +2253,17 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, param->always_check_erased = 1; #endif - if(options.empty_lost_and_found_overridden) + if (options.empty_lost_and_found_overridden) param->empty_lost_n_found = options.empty_lost_and_found; /* ... and the functions. */ if (yaffs_version == 2) { - param->write_chunk_tags_fn = - nandmtd2_write_chunk_tags; - param->read_chunk_tags_fn = - nandmtd2_read_chunk_tags; + param->write_chunk_tags_fn = nandmtd2_write_chunk_tags; + param->read_chunk_tags_fn = nandmtd2_read_chunk_tags; param->bad_block_fn = nandmtd2_mark_block_bad; param->query_block_fn = nandmtd2_query_block; - yaffs_dev_to_lc(dev)->spare_buffer = YMALLOC(mtd->oobsize); + yaffs_dev_to_lc(dev)->spare_buffer = + kmalloc(mtd->oobsize, GFP_NOFS); param->is_yaffs2 = 1; param->total_bytes_per_chunk = mtd->writesize; param->chunks_per_block = mtd->erasesize / mtd->writesize; @@ -2465,10 +2273,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, param->end_block = n_blocks - 1; } else { /* use the MTD interface in yaffs_mtdif1.c */ - param->write_chunk_tags_fn = - nandmtd1_write_chunk_tags; - param->read_chunk_tags_fn = - nandmtd1_read_chunk_tags; + param->write_chunk_tags_fn = nandmtd1_write_chunk_tags; + param->read_chunk_tags_fn = nandmtd1_read_chunk_tags; param->bad_block_fn = nandmtd1_mark_block_bad; param->query_block_fn = nandmtd1_query_block; param->is_yaffs2 = 0; @@ -2482,64 +2288,60 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, param->sb_dirty_fn = yaffs_touch_super; param->gc_control = yaffs_gc_control_callback; - yaffs_dev_to_lc(dev)->super= sb; - + yaffs_dev_to_lc(dev)->super = sb; #ifndef CONFIG_YAFFS_DOES_ECC param->use_nand_ecc = 1; #endif -#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES - param->wide_tnodes_disabled = 1; -#endif - param->skip_checkpt_rd = options.skip_checkpoint_read; param->skip_checkpt_wr = options.skip_checkpoint_write; - down(&yaffs_context_lock); + mutex_lock(&yaffs_context_lock); /* Get a mount id */ found = 0; - for(mount_id=0; ! found; mount_id++){ + for (mount_id = 0; !found; mount_id++) { found = 1; - ylist_for_each(l,&yaffs_context_list){ - context_iterator = ylist_entry(l,struct yaffs_linux_context,context_list); - if(context_iterator->mount_id == mount_id) + list_for_each(l, &yaffs_context_list) { + context_iterator = + list_entry(l, struct yaffs_linux_context, + context_list); + if (context_iterator->mount_id == mount_id) found = 0; } } context->mount_id = mount_id; - ylist_add_tail(&(yaffs_dev_to_lc(dev)->context_list), &yaffs_context_list); - up(&yaffs_context_lock); + list_add_tail(&(yaffs_dev_to_lc(dev)->context_list), + &yaffs_context_list); + mutex_unlock(&yaffs_context_lock); - /* Directory search handling...*/ - YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts)); - param->remove_obj_fn = yaffs_remove_obj_callback; + /* Directory search handling... */ + INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts)); + param->remove_obj_fn = yaffs_remove_obj_callback; - init_MUTEX(&(yaffs_dev_to_lc(dev)->gross_lock)); + mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock)); yaffs_gross_lock(dev); err = yaffs_guts_initialise(dev); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: guts initialised %s\n"), - (err == YAFFS_OK) ? "OK" : "FAILED")); - - if(err == YAFFS_OK) + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: guts initialised %s", + (err == YAFFS_OK) ? "OK" : "FAILED"); + + if (err == YAFFS_OK) yaffs_bg_start(dev); - - if(!context->bg_thread) - param->defered_dir_update = 0; + if (!context->bg_thread) + param->defered_dir_update = 0; /* Release lock before yaffs_get_inode() */ yaffs_gross_unlock(dev); /* Create root inode */ if (err == YAFFS_OK) - inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, - yaffs_root(dev)); + inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev)); if (!inode) return NULL; @@ -2547,11 +2349,11 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, inode->i_op = &yaffs_dir_inode_operations; inode->i_fop = &yaffs_dir_operations; - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode"); root = d_alloc_root(inode); - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done"); if (!root) { iput(inode); @@ -2559,15 +2361,14 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version, } sb->s_root = root; sb->s_dirt = !dev->is_checkpointed; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_read_super: is_checkpointed %d\n"), - dev->is_checkpointed)); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs_read_super: is_checkpointed %d", + dev->is_checkpointed); - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n"))); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done"); return sb; } - static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, int silent) { @@ -2591,7 +2392,6 @@ static struct file_system_type yaffs_fs_type = { .fs_flags = FS_REQUIRES_DEV, }; - #ifdef CONFIG_YAFFS_YAFFS2 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, @@ -2601,11 +2401,11 @@ static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, } static int yaffs2_read_super(struct file_system_type *fs, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) + int flags, const char *dev_name, void *data, + struct vfsmount *mnt) { return get_sb_bdev(fs, flags, dev_name, data, - yaffs2_internal_read_super_mtd, mnt); + yaffs2_internal_read_super_mtd, mnt); } static struct file_system_type yaffs2_fs_type = { @@ -2615,40 +2415,48 @@ static struct file_system_type yaffs2_fs_type = { .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; -#endif /* CONFIG_YAFFS_YAFFS2 */ +#endif /* CONFIG_YAFFS_YAFFS2 */ static struct proc_dir_entry *my_proc_entry; -static struct proc_dir_entry *debug_proc_entry; - -static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev * dev) -{ - buf += sprintf(buf, "start_block........... %d\n", dev->param.start_block); - buf += sprintf(buf, "end_block............. %d\n", dev->param.end_block); - buf += sprintf(buf, "total_bytes_per_chunk. %d\n", dev->param.total_bytes_per_chunk); - buf += sprintf(buf, "use_nand_ecc.......... %d\n", dev->param.use_nand_ecc); - buf += sprintf(buf, "no_tags_ecc........... %d\n", dev->param.no_tags_ecc); - buf += sprintf(buf, "is_yaffs2............. %d\n", dev->param.is_yaffs2); - buf += sprintf(buf, "inband_tags........... %d\n", dev->param.inband_tags); - buf += sprintf(buf, "empty_lost_n_found.... %d\n", dev->param.empty_lost_n_found); - buf += sprintf(buf, "disable_lazy_load..... %d\n", dev->param.disable_lazy_load); - buf += sprintf(buf, "refresh_period........ %d\n", dev->param.refresh_period); - buf += sprintf(buf, "n_caches.............. %d\n", dev->param.n_caches); - buf += sprintf(buf, "n_reserved_blocks..... %d\n", dev->param.n_reserved_blocks); - buf += sprintf(buf, "always_check_erased... %d\n", dev->param.always_check_erased); - buf += sprintf(buf, "\n"); +static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev) +{ + struct yaffs_param *param = &dev->param; + buf += sprintf(buf, "start_block........... %d\n", param->start_block); + buf += sprintf(buf, "end_block............. %d\n", param->end_block); + buf += sprintf(buf, "total_bytes_per_chunk. %d\n", + param->total_bytes_per_chunk); + buf += sprintf(buf, "use_nand_ecc.......... %d\n", + param->use_nand_ecc); + buf += sprintf(buf, "no_tags_ecc........... %d\n", param->no_tags_ecc); + buf += sprintf(buf, "is_yaffs2............. %d\n", param->is_yaffs2); + buf += sprintf(buf, "inband_tags........... %d\n", param->inband_tags); + buf += sprintf(buf, "empty_lost_n_found.... %d\n", + param->empty_lost_n_found); + buf += sprintf(buf, "disable_lazy_load..... %d\n", + param->disable_lazy_load); + buf += sprintf(buf, "refresh_period........ %d\n", + param->refresh_period); + buf += sprintf(buf, "n_caches.............. %d\n", param->n_caches); + buf += sprintf(buf, "n_reserved_blocks..... %d\n", + param->n_reserved_blocks); + buf += sprintf(buf, "always_check_erased... %d\n", + param->always_check_erased); return buf; } - -static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev * dev) +static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev) { - buf += sprintf(buf, "data_bytes_per_chunk.. %d\n", dev->data_bytes_per_chunk); + buf += + sprintf(buf, "data_bytes_per_chunk.. %d\n", + dev->data_bytes_per_chunk); buf += sprintf(buf, "chunk_grp_bits........ %d\n", dev->chunk_grp_bits); buf += sprintf(buf, "chunk_grp_size........ %d\n", dev->chunk_grp_size); - buf += sprintf(buf, "n_erased_blocks....... %d\n", dev->n_erased_blocks); - buf += sprintf(buf, "blocks_in_checkpt..... %d\n", dev->blocks_in_checkpt); + buf += + sprintf(buf, "n_erased_blocks....... %d\n", dev->n_erased_blocks); + buf += + sprintf(buf, "blocks_in_checkpt..... %d\n", dev->blocks_in_checkpt); buf += sprintf(buf, "\n"); buf += sprintf(buf, "n_tnodes.............. %d\n", dev->n_tnodes); buf += sprintf(buf, "n_obj................. %d\n", dev->n_obj); @@ -2659,19 +2467,29 @@ static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev * dev) buf += sprintf(buf, "n_erasures............ %u\n", dev->n_erasures); buf += sprintf(buf, "n_gc_copies........... %u\n", dev->n_gc_copies); buf += sprintf(buf, "all_gcs............... %u\n", dev->all_gcs); - buf += sprintf(buf, "passive_gc_count...... %u\n", dev->passive_gc_count); - buf += sprintf(buf, "oldest_dirty_gc_count. %u\n", dev->oldest_dirty_gc_count); + buf += + sprintf(buf, "passive_gc_count...... %u\n", dev->passive_gc_count); + buf += + sprintf(buf, "oldest_dirty_gc_count. %u\n", + dev->oldest_dirty_gc_count); buf += sprintf(buf, "n_gc_blocks........... %u\n", dev->n_gc_blocks); buf += sprintf(buf, "bg_gcs................ %u\n", dev->bg_gcs); - buf += sprintf(buf, "n_retired_writes...... %u\n", dev->n_retired_writes); - buf += sprintf(buf, "n_retired_blocks...... %u\n", dev->n_retired_blocks); + buf += + sprintf(buf, "n_retired_writes...... %u\n", dev->n_retired_writes); + buf += + sprintf(buf, "n_retired_blocks...... %u\n", dev->n_retired_blocks); buf += sprintf(buf, "n_ecc_fixed........... %u\n", dev->n_ecc_fixed); buf += sprintf(buf, "n_ecc_unfixed......... %u\n", dev->n_ecc_unfixed); - buf += sprintf(buf, "n_tags_ecc_fixed...... %u\n", dev->n_tags_ecc_fixed); - buf += sprintf(buf, "n_tags_ecc_unfixed.... %u\n", dev->n_tags_ecc_unfixed); + buf += + sprintf(buf, "n_tags_ecc_fixed...... %u\n", dev->n_tags_ecc_fixed); + buf += + sprintf(buf, "n_tags_ecc_unfixed.... %u\n", + dev->n_tags_ecc_unfixed); buf += sprintf(buf, "cache_hits............ %u\n", dev->cache_hits); - buf += sprintf(buf, "n_deleted_files....... %u\n", dev->n_deleted_files); - buf += sprintf(buf, "n_unlinked_files...... %u\n", dev->n_unlinked_files); + buf += + sprintf(buf, "n_deleted_files....... %u\n", dev->n_deleted_files); + buf += + sprintf(buf, "n_unlinked_files...... %u\n", dev->n_unlinked_files); buf += sprintf(buf, "refresh_count......... %u\n", dev->refresh_count); buf += sprintf(buf, "n_bg_deletions........ %u\n", dev->n_bg_deletions); @@ -2682,7 +2500,7 @@ static int yaffs_proc_read(char *page, char **start, off_t offset, int count, int *eof, void *data) { - struct ylist_head *item; + struct list_head *item; char *buf = page; int step = offset; int n = 0; @@ -2697,66 +2515,42 @@ static int yaffs_proc_read(char *page, /* Print header first */ if (step == 0) - buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__"\n"); + buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__ "\n"); else if (step == 1) - buf += sprintf(buf,"\n"); + buf += sprintf(buf, "\n"); else { - step-=2; - - down(&yaffs_context_lock); + step -= 2; + + mutex_lock(&yaffs_context_lock); /* Locate and print the Nth entry. Order N-squared but N is small. */ - ylist_for_each(item, &yaffs_context_list) { - struct yaffs_linux_context *dc = ylist_entry(item, struct yaffs_linux_context, context_list); + list_for_each(item, &yaffs_context_list) { + struct yaffs_linux_context *dc = + list_entry(item, struct yaffs_linux_context, + context_list); struct yaffs_dev *dev = dc->dev; if (n < (step & ~1)) { - n+=2; + n += 2; continue; } - if((step & 1)==0){ - buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name); + if ((step & 1) == 0) { + buf += + sprintf(buf, "\nDevice %d \"%s\"\n", n, + dev->param.name); buf = yaffs_dump_dev_part0(buf, dev); - } else + } else { buf = yaffs_dump_dev_part1(buf, dev); - + } + break; } - up(&yaffs_context_lock); + mutex_unlock(&yaffs_context_lock); } return buf - page < count ? buf - page : count; } -static int yaffs_stats_proc_read(char *page, - char **start, - off_t offset, int count, int *eof, void *data) -{ - struct ylist_head *item; - char *buf = page; - int n = 0; - - down(&yaffs_context_lock); - - /* Locate and print the Nth entry. Order N-squared but N is small. */ - ylist_for_each(item, &yaffs_context_list) { - struct yaffs_linux_context *dc = ylist_entry(item, struct yaffs_linux_context, context_list); - struct yaffs_dev *dev = dc->dev; - - int erased_chunks; - - erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - - buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n", - n, dev->n_free_chunks, erased_chunks, - dev->bg_gcs, dev->oldest_dirty_gc_count, - dev->n_obj, dev->n_tnodes); - } - up(&yaffs_context_lock); - - - return buf - page < count ? buf - page : count; -} /** * Set the verbosity of the warnings and error messages. @@ -2768,7 +2562,7 @@ static struct { char *mask_name; unsigned mask_bitfield; } mask_flags[] = { - {"allocate", YAFFS_TRACE_ALLOCATE}, + {"allocate", YAFFS_TRACE_ALLOCATE}, {"always", YAFFS_TRACE_ALWAYS}, {"background", YAFFS_TRACE_BACKGROUND}, {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, @@ -2786,15 +2580,14 @@ static struct { {"os", YAFFS_TRACE_OS}, {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, {"scan", YAFFS_TRACE_SCAN}, + {"mount", YAFFS_TRACE_MOUNT}, {"tracing", YAFFS_TRACE_TRACING}, {"sync", YAFFS_TRACE_SYNC}, {"write", YAFFS_TRACE_WRITE}, - {"verify", YAFFS_TRACE_VERIFY}, {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, {"verify_full", YAFFS_TRACE_VERIFY_FULL}, {"verify_all", YAFFS_TRACE_VERIFY_ALL}, - {"all", 0xffffffff}, {"none", 0}, {NULL, 0}, @@ -2802,7 +2595,7 @@ static struct { #define MAX_MASK_NAME_LENGTH 40 static int yaffs_proc_write_trace_options(struct file *file, const char *buf, - unsigned long count, void *data) + unsigned long count, void *data) { unsigned rg = 0, mask_bitfield; char *end; @@ -2844,15 +2637,17 @@ static int yaffs_proc_write_trace_options(struct file *file, const char *buf, done = 0; } else { for (x = buf + pos, i = 0; - (*x == '_' || (*x >= 'a' && *x <= 'z')) && - i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) + (*x == '_' || (*x >= 'a' && *x <= 'z')) && + i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) substring[i] = *x; substring[i] = '\0'; for (i = 0; mask_flags[i].mask_name != NULL; i++) { - if (strcmp(substring, mask_flags[i].mask_name) == 0) { + if (strcmp(substring, mask_flags[i].mask_name) + == 0) { mask_name = mask_flags[i].mask_name; - mask_bitfield = mask_flags[i].mask_bitfield; + mask_bitfield = + mask_flags[i].mask_bitfield; done = 0; break; } @@ -2887,18 +2682,18 @@ static int yaffs_proc_write_trace_options(struct file *file, const char *buf, char flag; flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-'; - printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name); + printk(KERN_DEBUG "%c%s\n", flag, + mask_flags[i].mask_name); } } return count; } - static int yaffs_proc_write(struct file *file, const char *buf, - unsigned long count, void *data) + unsigned long count, void *data) { - return yaffs_proc_write_trace_options(file, buf, count, data); + return yaffs_proc_write_trace_options(file, buf, count, data); } /* Stuff to handle installation of file systems */ @@ -2918,41 +2713,28 @@ static int __init init_yaffs_fs(void) int error = 0; struct file_system_to_install *fsinst; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs built " __DATE__ " " __TIME__ " Installing."); #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - T(YAFFS_TRACE_ALWAYS, - (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n"); #endif - - - - init_MUTEX(&yaffs_context_lock); + mutex_init(&yaffs_context_lock); /* Install the proc_fs entries */ my_proc_entry = create_proc_entry("yaffs", - S_IRUGO | S_IFREG, - YPROC_ROOT); + S_IRUGO | S_IFREG, YPROC_ROOT); if (my_proc_entry) { my_proc_entry->write_proc = yaffs_proc_write; my_proc_entry->read_proc = yaffs_proc_read; my_proc_entry->data = NULL; - } else + } else { return -ENOMEM; + } - debug_proc_entry = create_proc_entry("yaffs_stats", - S_IRUGO | S_IFREG, - YPROC_ROOT); - - if (debug_proc_entry) { - debug_proc_entry->write_proc = NULL; - debug_proc_entry->read_proc = yaffs_stats_proc_read; - debug_proc_entry->data = NULL; - } else - return -ENOMEM; /* Now add the file system entries */ @@ -2986,11 +2768,10 @@ static void __exit exit_yaffs_fs(void) struct file_system_to_install *fsinst; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n"))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs built " __DATE__ " " __TIME__ " removing."); remove_proc_entry("yaffs", YPROC_ROOT); - remove_proc_entry("yaffs_stats", YPROC_ROOT); fsinst = fs_to_install; @@ -3004,8 +2785,8 @@ static void __exit exit_yaffs_fs(void) } module_init(init_yaffs_fs) -module_exit(exit_yaffs_fs) + module_exit(exit_yaffs_fs) -MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); + MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010"); MODULE_LICENSE("GPL");